Bump scala-steward-org/scala-steward-action from 2.77.0 to 2.78.0

Bumps [scala-steward-org/scala-steward-action](https://github.com/scala-steward-org/scala-steward-action) from 2.77.0 to 2.78.0.
- [Release notes](https://github.com/scala-steward-org/scala-steward-action/releases)
- [Commits](scala-steward-org/scala-steward-action@v2.77.0...v2.78.0)

---
updated-dependencies:
- dependency-name: scala-steward-org/scala-steward-action
  dependency-version: 2.78.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/scala-steward.yml

@@ -17,7 +17,7 @@ jobs:
         app_id: 89628
         private_key: ${{ secrets.ARGONAUT_BOT_KEY }}
     - name: Launch Scala Steward
-      uses: scala-steward-org/scala-steward-action@v2.77.0
+      uses: scala-steward-org/scala-steward-action@v2.78.0
       with:
         github-token: ${{ steps.generate_token.outputs.token }}
         author-email: "74832392+argonaut-bot[bot]@users.noreply.github.com"